Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 64: Poster Session: Transport

TT 64.9: Poster

Donnerstag, 4. April 2019, 15:00–18:30, Poster D

Thermal conductivity and thermal diffusivity of suspended few-layer h-BN using the 3ω method — •Sofia Blanter, Nicola Paradiso, Denis Kochan, and Christoph Strunk — Institut für experimentelle und angewandte Physik, Universität Regensburg, Universitätstr. 31, 93053 Regensburg

We present measurements of thermal conductivity and thermal diffusivity for few-layer suspended hexagonal boron nitride. The measurements are performed on 15 nm thick suspended h-BN flakes using the 3ω method.

The flakes are exfoliated and transferred on top of a SiN membrane with an etched slit, using the all-dry viscoelastic stamping method [1].

We use the 1D diffusion model [2], that allows us to extract the thermal conductivity and thermal diffusivity of our flakes between 25 and 300 K. The temperature dependence of the thermal conductivity is consistent with previous measurements using a different technique [3], and demonstrates the reliability of the method. First results on few-layer MoSe₂ flakes are presented.
A. Castellanos-Gomez et al., 2D Materials 1 (2014), 011002
A. Sikora et al., Rev. Sci. Instrum. 83 (2012), 054902
I. Jo et al., Nano letters 13.2 (2013), 550-554